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View Full Version : JHB cermet coated housings (pics)

-xlr8planet-
03-06-2008, 01:14 PM
http://www.importracer.com.ar/ftp/gaby/DSC08431.JPG
http://www.importracer.com.ar/ftp/gaby/DSC08432.JPG
http://www.importracer.com.ar/ftp/gaby/DSC08433.JPG
http://www.importracer.com.ar/ftp/gaby/DSC08434.JPG
http://www.importracer.com.ar/ftp/gaby/DSC08435.JPG
http://www.importracer.com.ar/ftp/gaby/DSC08436.JPG

This 12a housings seem to be from a 79 or 80 engine right? Mine is 81 and Im not familiar with these. I know I should plug the holes for gas recirculation, but... should I remove the sleeve? Im not sure how to port these.

It also got the half moon on the spark plugs... I will have to grind that down

Any input is welcome
rx7carl
03-06-2008, 10:13 PM
Shrouded spark plug holes and lack of thermal reactor ports in the exhaust housing suggest its a later model, 83-85 IIRC.

Are you planning on porting them? Only remove the sleeve if your going for a really aggressive porting (race only).
-xlr8planet-
03-07-2008, 09:34 AM
Really? I was sure it was the other way around! :p

Im going with a street port, I think I wont remove them
charlies7
03-07-2008, 10:57 AM
Ive always wanted to try the JHB housings..I just get mixed reviews, maybe when I build my spare engine...
rx7carl
03-09-2008, 02:17 PM
Really? I was sure it was the other way around! :p

Im going with a street port, I think I wont remove them

Look in the RB catalog/tech tips.

Then dont remove them. Not for a streetport.
warwickben
03-10-2008, 04:17 PM
can you pm me the cost you paid for 2.